16th Annual Conference of the International Speech Communication Association

Dresden, Germany
September 6-10, 2015

SABR: Sparse, Anchor-Based Representation of the Speech Signal

Christopher Liberatore, Sandesh Aryal, Zelun Wang, Seth Polsley, Ricardo Gutierrez-Osuna

Texas A&M University, USA

We present SABR (Sparse, Anchor-Based Representation), an analysis technique to decompose the speech signal into speaker-dependent and speaker-independent components. Given a collection of utterances for a particular speaker, SABR uses the centroid for each phoneme as an acoustic “anchor,” then applies Lasso regularization to represent each speech frame as a sparse non-negative combination of the anchors. We illustrate the performance of the method on a speaker-independent phoneme recognition task and a voice conversion task. Using a linear classifier, SABR weights achieve significantly higher phoneme recognition rates than Mel frequency Cepstral coefficients. SABR weights can also be used directly to perform accent conversion without the need to train a speaker-to-speaker regression model.

Full Paper

Bibliographic reference.  Liberatore, Christopher / Aryal, Sandesh / Wang, Zelun / Polsley, Seth / Gutierrez-Osuna, Ricardo (2015): "SABR: sparse, anchor-based representation of the speech signal", In INTERSPEECH-2015, 608-612.